Oil burner



March 16 1926. 1,577,114

c. DE WALT OIL BURNER Filed se t. 9. 1924 2 Sheets-Sheet 1 March 16,1926. 1,577,114

C. L. DE WALT OIL BURNER Filed Sept. 192 1 2 Sheets-Sheet 2 55 5 5 64: i Z Q V Z Patented Mar. 16, 1926.

UN l TED CHARLES L.

P i i i E DE WALT, OFWORCIEISTER, 'MASSACE-EUSETTS, ASSIGNO'R'OF ONE-HALF 'IO 'TVI'NTRE1D S2 GRIFFITH, OF'WORCESTER, MASSACHUSETTS.

-OI-L 5 BURNER.

Application filed September To all whom it may concern: Be it known that 1, CHARLES L. DE WALT, a citizen of theUnited States, residing at lVorcester, in the county of Worcester and State of Massachusetts,- have invented a' new and useful Oil Burner, of which the following is a specification.

This invention relates-to an oil burner of the type in which air is forced into the furnace around the oil supply to provide a spray of oil. The invention is designed for use either in domestic furnaces or in commercial plants for producing steam or' heating in any other way.

The principal objects of the invention are to provide a construction in'which a-plurality of-nozz'les direct sprays of oil toward a common point or in crossing streams so that no pilot flamev will be necessary, as the several flames will ignite those from the other burners in case of trouble; to provide a construction in which the size of the-opening through which the oil passes can be reduced very much over the or dinary practice because the oil and. air are preheated; and to provide a burner of higher efficiency than has been possible heretofore.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a plan of a preferred embodiment of this invention for use in domestic steam or hot water heaters and the like;

Fig. 2 is a sectional view on the line 22 of Fig. 1;

Fig.3 is a side view of one burner on an enlarged scale;

Fig. 4 is a plan of the same;

Fig. 5 is a plan of a modified form of burner for use in larger plants;

Fig. 6 is alongitudinal central sectional view of the same on'the hne 66 of Fig. 5; and

Fig. "7 is a transversesectional view onv the line'7-.? of'FigQ 6. L

Referring first to the first sheet of drawings, it will be seen that the burner shown therein is of a circular compact form and that it can be inserted in thedoor of an ordinary domestic furnace, either of the steam or hot water type or even a hot air furnace and located on the grate which can form its sole support, if desired This burner consists of a round or annular cast iron casing 10 consisting of two parts se 9, 1924. Serial No. 736,783.

cured together by screws or bolts 11 through their fiat flanges. This leaves an annular space 12'substantially circular in crosssection for receiving the air from an air supply pipe or connection 13. The air is blown in to this passage and'has its outlet around the several burners, as will appear.

The oil comes in through a pipe 14 and connections 15 to a pipe 16 located centrally inside the air supply pipe 13 and spaced from the walls thereof. This pipe 16 connects into a circular oil pipe, 17' which is located in the center of the circular air space 12 and is held in position by set screws 18 or the like.

From the circular fuel pipe 17 lead a plurality of tubes 19. In this case I have shown four of them, each slanted on an angle and terminating in a small perforated tip. Although the minimum size for such a perforation heretofore has been about 0i an inch I can use as small a one as that produced by a No. drill, namely about .013" in diameter. These four oil. supplying tubes 19 are surrounded by casings 20 which are mounted on the casing 10 and connected with the air space 12 to constitute nozzles. The nozzles preferably project at an angle of 45 degrees from the horizontal. Asthey' screw into the casing 20 they are adjustable. Each of these nozzles 20 has an exit opening in the end through whichthe air is forced under pressure, taking the oil with it and spraying it in a fine spray. These parts are mounted on'the cast iron casing 10 as indicated and they all converge toward a common point so that their-sprays would cross each other. Each one serves as a pilot light for all the others and three of them might get temporarily clogged at one time and, on account offth e fourth flame, they would all burst Lite flame again immediately upon removal "of the cause. In thisway no pilot light 'is needed, thus reducing the expense and diflic-ulty. of operating one of these burners. It will be seen that on account of the direction in, which the flames are projected from the burners the oil itself'is preheated in the oil ring before going through the nozzle and the air is preheated also. On account of this double preheating it can be made to form a perfect s ray, of course, by the regulation of the a justable casing 20. 

